<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport"
        content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no,viewport-fit=cover">
    <title>MVC</title>
</head>

<body>
    <div id="page">
        <div id="app1">
            <div class="output">
                <span id=number>100</span>
            </div>
            <div class="actions">
                <button id="add1">+1</button>
                <button id="minus1">-1</button>
                <button id="mul2">×2</button>
                <button id="divide2">÷2</button>
            </div>
        </div>
        <div id="app2">
            <ol class="tab-bar">
                <li>1</li>
                <li>2</li>
            </ol>
            <ol class="tab-content">
                <li>内容1</li>
                <li>内容2</li>
            </ol>
        </div>
        <div id="app3">
            <div class="square"></div>
        </div>
        <div id="app4">
            <div class="circle"></div>
        </div>
    </div>
    <script src="main.js"></script>
</body>

</html>